Examples of org.jboss.ha.framework.server.lock.YieldingGloballyExclusiveClusterLockSupport

Package org.jboss.ha.framework.server.lock

Examples of org.jboss.ha.framework.server.lock.YieldingGloballyExclusiveClusterLockSupport

org.jboss.ha.framework.server.lock.YieldingGloballyExclusiveClusterLockSupport
Support class for cluster locking scenarios where threads cannot acquire a local lock unless the node owns a cluster-wide lock, but where the node owning the cluster-wide lock will yield it to another node if no thread has a local lock. Use case for this is scenarios like session management where a node needs to acquire ownership of a cluster-wide lock for a session, but then once acquired wishes to handle multiple calls for the session without make cluster-wide locking calls. The node handling the session would acquire the cluster-wide lock if it doesn't have it and thereafter would only use local locks; if another node received a request for the session it would request the lock and the first node would release it if no local locks are held. @author Brian Stansberry


   @Override
   protected YieldingGloballyExclusiveClusterLockSupport createClusteredLockManager(String serviceHAName, 
         HAPartition partition, LocalLockHandler handler)
   {
      return new YieldingGloballyExclusiveClusterLockSupport(serviceHAName, partition, handler);
   }

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   }


   public void testBasicRemoteLock() throws Exception
   { 
      TesteeSet<YieldingGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 2);
      YieldingGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      LocalLockHandler handler = testee.getLocalHandler();
      RpcTarget target = testeeSet.target;
      
      ClusterNode caller = testee.getCurrentView().get(0);
      assertFalse(node1.equals(caller));
      
      resetToStrict(handler);      
      replay(handler);

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   }
   
   public void testContestedRemoteLock() throws Exception
   { 
      TesteeSet<YieldingGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
      YieldingGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      LocalLockHandler handler = testee.getLocalHandler();
      RpcTarget target = testeeSet.target;
      
      ClusterNode caller1 = testee.getCurrentView().get(0);
      assertFalse(node1.equals(caller1));
      
      ClusterNode caller2 = testee.getCurrentView().get(2);
      assertFalse(node1.equals(caller2));
      
      resetToStrict(handler);      
      replay(handler);

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    * @throws Exception
    */
   public void testDeadMemberCleanupAllowsRemoteLock() throws Exception
   { 
      TesteeSet<YieldingGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
      YieldingGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      LocalLockHandler handler = testee.getLocalHandler();
      RpcTarget target = testeeSet.target;
      
      List<ClusterNode> members = testee.getCurrentView();
      ClusterNode caller1 = members.get(0);
      assertFalse(node1.equals(caller1));
      
      ClusterNode caller2 = members.get(2);
      assertFalse(node1.equals(caller2));
      
      resetToStrict(handler);      
      replay(handler);
      
      RemoteLockResponse rsp = target.remoteLock("test", caller1, 1000);
      
      assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
      assertNull(rsp.holder);
      
      verify(handler);
      
      // Change the view
      Vector<ClusterNode> dead = new Vector<ClusterNode>();
      dead.add(caller1);
      
      Vector<ClusterNode> all = new Vector<ClusterNode>(members);
      all.remove(caller1);
      
      resetToStrict(handler);
      replay(handler);
      
      testee.membershipChanged(dead, new Vector<ClusterNode>(), all);
      
      verify(handler);
      
      // A call from a different caller should work 
      resetToStrict(handler);

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Related Classes of org.jboss.ha.framework.server.lock.YieldingGloballyExclusiveClusterLockSupport

org.jboss.ha.framework.interfaces.ClusterNode

org.jboss.test.cluster.defaultcfg.test.YieldingGloballyExclusiveClusterLockSupportUnitTestCase

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